Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
sach kem » hanh kem
cau tra » ca tra, cau truc, cau thac
dinh ke » dinh ket, dinh ve, dinh le
va dinh » van dinh, va kinh, va tinh
nam xuc » cam xuc, nam xua, nam thuc
xay hoi » xa hoi, tay hoi, cay phoi
xuc va » duc va, tuc va, luc va
cau ra » cau ha, cau va, cau ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach kem) or (sach y)) dang xay hoi. hieu van nam xuc va dinh ke ((cau tra) OR (cau ra))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach kem) OR (sach y)) dang xay hoi. hieu van nam xuc va dinh ke ((cau tra) OR (cau ra)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach kem) or (sach y)) dang xay hoi. hieu van nam xuc va dinh ke ((cau tra) OR (cau ra))".
• Adding a wildcard symbol may retrieve word variants: te ((sach kem) or (sach y)) dang xay hoi. hieu van nam xuc va dinh ke ((cau tra) OR (cau ra))*.